Study guides, Class notes & Summaries

MMSC 490 practice quiz 9 chapter 16- Correctly Answered Signaling by neurotransmitters is an example of _______ signaling. - Answer ️️ -paracrine Peptide hormones and growth factors act on target cells by binding to cell surface and _______ receptors. - Answer ️️ -soluble extracellular The effect of acetylcholine on the heart muscle cells is to - Answer ️️ -stimulate one contraction Aspirin inhibits ______ synthesis. - Answer ️️ -prostaglandin Diacylglycerol and calcium ac...

MMSC 490 Exam 3 (Set 3) Questions and Answers The eukaryotic cell cycle is composed of four phases in the following order: S; G1; G2; M G1; S; G2; M G1; G2; S; M G1; M; G2; S - Answer ️️ -G1; S; G2; M The length of time it takes for the cells labeled during DNA synthesis to begin to enter mitosis is a good estimate of the length of the .............................. phase(s). G2 G1 M S - Answer ️️ -G2 In a typical cycling mammalian cell, .............................. of the ...

MMSC 490 Exam 1 PQ Questions and Answers The light microscope was used to observe the cellular structure of cork by ____, who named the chambers "cells". - Answer ️️ -Hooke Which fish is proving to be a useful model organism for the study of vertebrate development? - Answer ️️ -Zebrafish Arabidopsis thaliana is a model organism for studying the molecular biology of - Answer ️️ - Plants The original cell was thought to have arisen from the enclosure of self-replicating ____ b...

MMSC 490 practice quiz 1- Correctly Solved At the time life arose on Earth, Earth's atmosphere contained abundant amounts of all of the following except - Answer ️️ -O2 (H2, N2, and H2s were all present) RNA is believed to have been the initial genetic system because it can - Answer ️️ -catalyze the polymerization of nucleotides into another RNA strand. Mitochondria and chloroplasts resemble bacteria in that they - Answer ️️ -- have their own DNA - have their own ribosomes -...

MMSC 490 practice quiz 6 chapter 7- 100% Correctly Solved Which of the following does not contribute to the large variety of antigen-binding specificities found among the immunoglobulins? - Answer ️️ -retrotransposons In addition to synthesizing DNA, DNA polymerase I has a second catalytic activity; it can - Answer ️️ -remove RNA primers How many replication origins are there in the human genome? - Answer ️️ -30,000 DNA replication is - Answer ️️ -semiconservative Which o...

MMSC 490 Practice Quizzes Modules 1-4 with complete solutions The feature that most clearly distinguishes eukaryotes from prokaryotes is the presence of .......... in eukaryotic cells. RNA molecules a nucleus oxidative phosphorylation ribosomes - Answer ️️ -Nucleus Cytoplasmic organelles are absent in both prokaryotic and eukaryotic cells. present in prokaryotic cells and absent in eukaryotic cells. absent in prokaryotic cells and present in eukaryotic cells. present in both prok...

MMSC490 Questions Final chp.18 Exam Questions with Correct Answers The Bcl-2 family of proteins is divided into three functional groups that contain and share as many as four Bcl-2 homology domains (BH domains). Which of the following is common to all members of the Bcl-2 family? a. BH1 b. BH2 c. BH3 d. BH4 - Answer ️️ -BH3 which of the following stem cells have the capacity to give rise to all the differentiated cell types of adult organisms? - Answer ️️ -embryonic stem cells ...

MMSC490 Exam 1 Questions and Answers | Verified & Updated The feature that most clearly distinguishes eukaryotes from prokaryotes is the presence of..... in eukaryotic cells - Answer ️️ -a nucleus Cytoplasmic organelles are - Answer ️️ -absent in prokaryotic cells and present in eukaryotic cells The eukaryotic nucleus contains.... DNA molecules - Answer ️️ -multiple linear Stanley miller applied electric sparks to a reducing atmosphere of methane, ammonia, water, hydrogen, an...

MMSC 490 Questions FINAL Chp.17 with 100% correct Answers Damaged DNA is sensed by a complex of proteins that activate the protein kinase - Answer ️️ -ATM or ATR Fertilization of a frog egg triggers the resumption of meiosis by an increase in - Answer ️️ - Ca2+ The retinoblastoma protein (Rb) binds to and inhibits - Answer ️️ -Transcription factor E2F MPF is a general regulator of the transistion from - Answer ️️ -G2 to M At fertilization, the sperm binds to a receptor on...

MMSC490 Final Exam Questions with 100% Answers Humans possess about .............. different cell types. 100 200 500 1,000 - Answer️️ -200 In adult organisms, cell death must be balanced by cell growth. differentiation. renewal. migration. - Answer️️ -renewal The distinct series of changes that characterizes programmed cell death is called necrosis. apoptosis. sepsis. execution. - Answer️️ -apoptosis Cells that die as the result of acute injury undergo lysis. sepsis...